Mercury - 500 15.00RH31 15R - 48-8M0155582. When precision and performance matter most, the Mercury - 500 15.00RH31 15R - 48-8M0155582 delivers the control serious boaters demand. Built for Mercury Racing 500R outboards, this right-hand stainless steel propeller balances high-speed efficiency with powerful acceleration, offering elite responsiveness on the water.. Key Features. Right-Hand Rotation Design - Optimized for single or matched multi-engine configurations. 15" Diameter x 31" Pitch - Ca